440 with Indy SR heads - what headers

[moparstud440]

To put a 440 with Indy SR heads in a 75 duster that has the stock k frame, steering, etc. What headers will fit?

 

[Fisher]

Are exhaust ports raised or in the factory location? that is the first thing you need to know.

 

[roccodart440]

TTI makes a set if not mistaken

 

[moparstud440]

I believe the SR has raised exhuast ports

 

[Fisher]

Any idea of the HP rating of this motor? You're looking at a 1-7/8" to 2" primary tube header. The raised ports will cause some fitment issues i am thinking.

 

[rumblefish360]

IIRC, SR is for Stock Replacement

 

[AndyF]

To put a 440 with Indy SR heads in a 75 duster that has the stock k frame, steering, etc. What headers will fit?

I don't think you'll find any headers that fit that combination. If you remove the K frame and the torsion bars then you might be able to wiggle some headers on there.

 

[PRH]

TTi has them.

2-2 1/8 stepped with a 3.5” collector.

I know of two people who used the Pro Parts headers for that application as well.

 

[AndyF]

Not with stock suspension according to the website.

 

[PRH]

You’re correct.

I was looking at a TTi application listing on a different site, not TTi.

Just shows you really need to do your homework.

However, as I stated earlier, I do know two people who used the Pro Parts headers in Dusters with raised port Indy heads on RB blocks.

I don’t know if they dropped right in, or if there were some mods required.

 

[AndyF]

Yeah the TTi website can be a little confusing to read thru. It reads like a legal document with what fits up front and then notes below that tell you what doesn't fit.

I don't know about the Pro Parts. I think Mazzolini sells them so best to talk to him. If I remember correctly one tube goes over the frame on those headers.

 

[meathead66]

Not that I’m an authority but Andy’s correct. Per TTI instructions “extensive modifications are necessary”

 

[Fisher]

Can you tell us what the hp rating of this 440 is going to be, is this a race car or a street car? You may be better off building a low deck big block.